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Find the expression which has a sum nearly equal to 70.

  • A

    55 + 22

  • B

    19 + 92

  • C

    45 + 39

  • D

    25 + 43 

The correct answer is "25 + 43".


Solution:
To find the correct answer, we find the sum of each expression by rounding (up or down) the addends.

At Option A:
Round the addends to the nearest tens and then add.

55  +  22  =  ?
↓          ↓
60  +  20  =  80

This expression has a sum nearly equal to 80.


At Option B:

19  +  92  =  ?
↓           ↓
20  +  90  =  110

This expression has a sum nearly equal to 110.


At option C:

45  +  39  =  ?
↓          ↓
50  +  40  =  90

This expression has a sum nearly equal to 90.


At the last option D:

25  +  43  =  ?
↓          ↓
30  +  40  =  70

This expression has a sum nearly equal to 70.


So, the desired answer is "25 + 43".